title: (E)-2,2'-[3-(4-Chloro-phen-yl)prop-2-ene-1,1-di-yl]bis-(3-hy-droxy-5,5-di-methyl-cyclo-hex-2-en-1-one).
abstract: The title compound, C25H29ClO4, adopts a trans conformation about the C=C double bond and the di-methyl-cyclo-hexenone rings both show an envelope conformation with the dimethyl-substituted C atom as the flap. In the mol-ecule, the hy-droxy and carbonyl groups form two intra-molecular O-H⋯O hydrogen bonds typical for xanthene derivatives. In the crystal, weak C-H⋯O hydrogen bonds link the mol-ecules into chains running parallel to the a-axis direction.
authors.affiliation: Advanced Analysis Center, Korea Institute of Science & Technology, Hwarangro 14-gil, Seongbuk-gu, Seoul 136-791, Republic of Korea.
authors.forename: Joo Hwan
authors.initials: JH
authors.lastname: Cha
authors.forename: Jae Kyun
authors.initials: JK
authors.lastname: Lee
authors.forename: Sun-Joon
authors.initials: SJ
authors.lastname: Min
authors.forename: Yong Seo
authors.initials: YS
authors.lastname: Cho
authors.forename: Junghwan
authors.initials: J
authors.lastname: Park